They operate by nicknames here, though I have resisted adopting an official one, so I have plenty arbitrary ones, but none that I respond to all the time. Here's 澎澎 Pong Pong sometimes also known as Ho Ho for his snigger （澎季群）who stays near 阿里山 (Alishan), and 瑋瑋 who is accident prone. They're my group mates in a class I take on Wednesdays: Spiritual Care in the End Stage of Life, where a lot of our class is really, about happiness.